Safety-envelop.



F. 'R. LARSON.

SAFETY ENVELOP.

APPLICATION 'FILED JUNE 12', 1914.

1,142,444. Patented June 8, 1915.

2 SHEETS-SHEET l.

THE NORRIS PETERS co.. FHOwLITl-IQ. WASHING TON, D. C.

F. R. LARSON.

SAFETY ENVELOP.

APPLICATION FILED JUNE 12. 1914. v 1;,142,444. 1 Patented June 8, 1915.

2 SHE ETSSHEET 2.

THE NORRIS PETERS CO., PHOTD-LITHO WASHINGTI" To all whom it may concern 'FB-ED' it. reason, or New sWEDEr MAINE.

.7 sArErY-ENvELor.

Be it known that I, FRED R. LARSON, a' citizen of the United States, residing at New Sweden, State of Maine, have invented certain new and useful Improvements in Safety- Envelops, of which the following 1s a specification. v

This invention relates to an envelop and the principal object of the invention is to provide improved means for preventing the envelop from being opened without detection after the envelop has once been sealed. Another object of the invention is to pro vide an envelop of the character described which does not need any. special construction and in which the safety device is very simple and can be applied to the envelop at fore itis sealed; Fig. 4 is a view similar to Fig. 1 but looking at the back of the en velop; Fig. 5 is a view of the blank from which this envelop is formed.

In Fig.5 there has been shown the blank from which this envelop is formed and from an inspection of this figure it will be seen that the envelop comprises a body portion 10 from which there extend theend flaps 11 and 12 and upper and lower side flaps 13 and 14. This envelop is very similar to l the envelops which are now used, the only difference being that the flap 11 and theupper and lower side flaps 13 and 14 are provided with openings 15, 16 and 17 which register when the envelop is sealed.

'7 A relatively thin strip 18 is secured to the innerface. of the end flap 11 and is passed through the opening 15 and then passed through the opening 17. of the flap 14 which is secured to the edges of theend flapsv 11 and 12,'as shown in Fig.3. After the letterhas been placed in the'envelop the strip 18 is passed throughthe openinglfi specification of Letters ratent. Patented J une 8, 1915., Application filedauneia, 1914. Serial at. 844,718.

and the upper side flap 13 is then secured-to the flaps 11, 12 and 14, as shown'in Fig. 1-; The strip 18 is then carried across the flaps 13 and 11 as shown in this figure and stuck to the same and then bent over the edge of the envelop and stuck to the back of the same as shown in Fig. 2. This strip 18 is no s'raesreranr W f' of such length that when in the position;

shown in Figs. 1, 2 and 4 the end ofthe strip will be covered by the stamp 19 thus making it more difficult to'open the envelop without detection since in order to do so it is first necessary to remove'the stamp and then the strip. Of course when the envelop is opened'by the proper party the strip 18 will be torn in doingvso. If an unauthorized person has opened the envelop previous to the opening of the same by the proper person the strip 18 will be torn thus indicat ing that the letter has been opened by per sons not having authority to'open the same. 1

l have therefore provided a safety envelop which is. very cheap to manufacture since theenvelop does not'need any special construction, it only being necessary to provide,

the strip 18 and to form the openings 15,

16. and 17 in the flaps 11, 13 and 14.

What is claimed is 1. A safety envelop comprising a'body portion, end flaps' carried by said body portion, upper and lower side flaps carried by said body portion, said end flaps being folded upon said body portion and said lower side flaps being folded upon said end flaps and secured thereto and' being pro vided with an opening registering with an opening formed in one of said end flaps, a sealingstripsecured to the inner face of the perforated end flap and passing through the registering openings, said upper side flaps being secured upon said end flaps and lower sidefiaps and provided with an open 7 ing through which said sealing strip passes, 1

said sealing strip being extendedaoross' said upper side flap and perforated end flap and having its end portion carried around and I secured to the front face of said body portion.

' 2. A safety envelop comprising a bodyportion, a wall'consisting of a plurality of sections positioned in overlapping relation and provided with registering openings, a

sealing strip secured to the inner face of said wall and passing through the register.- ing openings thereof, a closure flap provided With an opening through which said sealing strip passes When said closure flap is in a In testimony whereof I affix my signaclosed position, said seallng strip belng eX- ture in presence of two Witnesses.

tended across said envelop to the edge there- FRED R. LARSON. of and having its end portion carried around Witnesses:

5 and secured to the front face of said body 'VERNA MORGAN,

portion. CYR S F. SMALL.

@opies of this patent may be obtained for five cents gaqh, by iii lfimsi il g 1 1 Commissioner of Eatento. Washington, I). G. 

